The term “mastic” is widely used in the construction industry, especially by tile setters. Many electricians do not realise that the gooey electrical tape they use to resist moisture is also a mastic. But this mastic rubber material is specially formulated for use as a dielectric insulator. Mastics from 3M are compatible with thermoplastic rubber wire insulation.
When you are working with odd shaped components or needing to tuck in some insulation where your tape won’t reach; mastic is the product to use. Think of it as putty on a roll.
We are the distributor of 3M self fusing high voltage rubber tapes. Please contact us to check for stock availability.